CN108241091B - Method for searching peak value of 2FSK signal by using frequency spectrograph and frequency spectrograph - Google Patents
Method for searching peak value of 2FSK signal by using frequency spectrograph and frequency spectrograph Download PDFInfo
- Publication number
- CN108241091B CN108241091B CN201611224240.5A CN201611224240A CN108241091B CN 108241091 B CN108241091 B CN 108241091B CN 201611224240 A CN201611224240 A CN 201611224240A CN 108241091 B CN108241091 B CN 108241091B
- Authority
- CN
- China
- Prior art keywords
- data
- maximum value
- maximum
- peak
- nth
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
- G01R23/16—Spectrum analysis; Fourier analysis
Landscapes
- Physics & Mathematics (AREA)
- Mathematical Physics (AREA)
- General Physics & Mathematics (AREA)
- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
Abstract
The invention provides a method for searching a peak value of a 2FSK signal by using a frequency spectrograph and the frequency spectrograph, wherein the method comprises the following steps: capturing data on a frequency spectrograph screen by using an FFT (fast Fourier transform) mode; sequentially searching a first maximum value, a second maximum value, … and an nth maximum value in the data, wherein the first maximum value is more than or equal to the second maximum value, … and more than or equal to the nth maximum value, and n is a positive integer; storing the first time maximum, the second time maximum, …, the nth time maximum in a peak list.
Description
Technical Field
The invention relates to the technical field of computers, in particular to a 2FSK (binary frequency shift keying) signal processing method, and specifically relates to a method for searching a 2FSK signal peak value by using a frequency spectrograph and the frequency spectrograph.
Background
In the prior art, the conventional frequency spectrograph can only display transient signals (such as 2FSK signals) in a maximum hold mode due to the excessively slow scanning speed, and cannot restore the real waveform state of the transient signals. However, the existing peak point searching method generally adopts a bubbling method, and if the input transient signal has poor quality and has no obvious peak point, the common peak point searching method is easy to miss or increase the peak point.
Therefore, it is highly desirable to develop a method for searching peaks of 2FSK signals, so as to completely capture and analyze the peaks of multiple groups of 2FSK signals, and arrange the peaks of multiple groups of 2FSK signals according to the manner set by the client.
Disclosure of Invention
In view of this, the technical problem to be solved by the present invention is to provide a method for searching peak values of 2FSK signals by using a frequency spectrograph and a frequency spectrograph, so as to solve the problem that the conventional frequency spectrograph cannot completely capture and analyze multiple groups of peak values of 2FSK signals in the prior art.
In order to solve the above technical problem, an embodiment of the present invention provides a method for performing peak search of a 2FSK signal by using a frequency spectrograph, including: capturing data on a frequency spectrograph screen by using an FFT (fast Fourier transform) mode; sequentially searching a first maximum value, a second maximum value, … and an nth maximum value in the data, wherein the first maximum value is more than or equal to the second maximum value, … and more than or equal to the nth maximum value, and n is a positive integer; storing the first time maximum, the second time maximum, …, the nth time maximum in a peak list.
The specific implementation mode of the invention provides a frequency spectrograph with a 2FSK signal peak searching function, which comprises: the grabbing unit is used for grabbing data on a frequency spectrograph screen by using an FFT (fast Fourier transform) mode; the searching unit is used for sequentially searching a first maximum value, a second maximum value, … and an nth maximum value in the data, wherein the first maximum value is more than or equal to the second maximum value, … and more than or equal to the nth maximum value, and n is a positive integer; a storage unit, configured to store the first maximum, the second maximum, …, and the nth maximum in a peak list.
According to the above embodiments of the present invention, the method for performing 2FSK signal peak search by using a frequency spectrograph, the frequency spectrograph, and the frequency spectrograph have at least the following advantages: grabbing data on a frequency spectrograph screen by using Fast Fourier Transform (FFT); then searching a secondary maximum value, storing the searched secondary maximum value into a peak value table, and finally sequencing the secondary maximum values in the peak value table to obtain a peak value point; transient signals can be captured and analyzed more quickly, and all transient signals within a certain bandwidth can be displayed and analyzed simultaneously; and finding all peak points of the broadband frequency hopping multiple groups of 2FSK signals in a peak value conventional reading mode, and respectively forming the peak points into multiple groups of 2FSK signals for subsequent display and analysis.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a flowchart of a first embodiment of a method for performing a 2FSK signal peak search using a frequency spectrograph according to an embodiment of the present invention;
fig. 2 is a flowchart of a second embodiment of a method for performing peak search of a 2FSK signal by using a frequency spectrograph according to the embodiment of the present invention;
fig. 3 is a schematic block diagram of a first embodiment of a spectrum analyzer with a 2FSK signal peak search function according to an embodiment of the present invention;
fig. 4 is a schematic block diagram of a second embodiment of a spectrum analyzer with a 2FSK signal peak search function according to an embodiment of the present invention;
fig. 5 shows a 2FSK signal peak searched using a conventional spectrometer, according to an embodiment of the present invention.
Detailed Description
For the purpose of promoting a clear understanding of the objects, aspects and advantages of the embodiments of the invention, reference will now be made to the drawings and detailed description, wherein there are shown in the drawings and described in detail, various modifications of the embodiments described herein, and other embodiments of the invention will be apparent to those skilled in the art.
The exemplary embodiments of the present invention and the description thereof are provided to explain the present invention and not to limit the present invention. Additionally, the same or similar numbered elements/components used in the drawings and the embodiments are used to represent the same or similar parts.
As used herein, the terms "first," "second," …, etc., do not denote any order or sequence, nor are they used to limit the present invention, but rather are used to distinguish one element from another or from another element or operation described in the same technical language.
With respect to directional terminology used herein, for example: up, down, left, right, front or rear, etc., are simply directions with reference to the drawings. Accordingly, the directional terminology used is intended to be illustrative and is not intended to be limiting of the present teachings.
As used herein, the terms "comprising," "including," "having," "containing," and the like are open-ended terms that mean including, but not limited to.
As used herein, "and/or" includes any and all combinations of the described items.
As used herein, the terms "substantially", "about" and the like are used to modify any slight variation in quantity or error that does not alter the nature of the variation. Generally, the range of slight variations or errors modified by such terms may be 20% in some embodiments, 10% in some embodiments, 5% in some embodiments, or other values. It should be understood by those skilled in the art that the aforementioned values can be adjusted according to actual needs, and are not limited thereto.
Certain words used to describe the present application are discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art in describing the present application.
Fig. 1 is a flowchart of a first embodiment of a method for performing peak search of a 2FSK signal by using a frequency spectrograph according to an embodiment of the present invention, where the method shown in fig. 1 may be applied to a conventional frequency spectrograph, and data on a screen of the frequency spectrograph is captured by using Fast Fourier Transform (FFT); then searching the secondary maximum value, and storing the searched secondary maximum value into a peak value table.
The specific embodiments shown in the drawings include:
step 101: and grabbing data on a frequency spectrograph screen by using an FFT (fast Fourier transform) mode. The 2FSK (binary frequency shift keying) transient signal is captured by adopting an FFT (fast Fourier transform) mode, and the frequency spectrograph can display the change condition of the 2FSK transient signal in a set bandwidth range and can truly represent the characteristics of an input signal.
Step 102: and sequentially searching a first maximum value, a second maximum value, … and an nth maximum value in the data, wherein the first maximum value is more than or equal to the second maximum value, … and more than or equal to the nth maximum value, and n is a positive integer.
Step 103: storing the first time maximum, the second time maximum, …, the nth time maximum in a peak list.
Referring to fig. 1, compared with the frequency sweep mode, the FFT mode can capture and analyze 2FSK transient signals more quickly, and can display and analyze all signals within a certain bandwidth at the same time, and can find all peak points of multiple groups of 2FSK signals with frequency hopping in the bandwidth, without missing or increasing peaks.
Fig. 2 is a flowchart of a second embodiment of a method for performing peak search of a 2FSK signal by using a frequency spectrograph according to an embodiment of the present invention, as shown in fig. 2, a preset maximum value may be set as required, and the preset maximum value is large enough.
In the embodiment shown in the figure, before step 103, the method further comprises:
step 102-1: the peak list is initialized. I.e. to set the value in the peak list to 0.
After step 103, the method further comprises:
step 104: sorting the first, second, …, nth maxima.
Referring to fig. 2, after the first maximum, the second maximum, … and the nth maximum are found, the first maximum, the second maximum, … and the nth maximum may be sorted. Particularly, the data can be sorted according to frequency/amplitude, and visual checking is facilitated.
In another embodiment of the present invention, step 102 further comprises: sequentially finding out a plurality of wave peak values and a plurality of wave valley values in the data by using three adjacent value comparison methods; and determining a first maximum, a second maximum, … and an nth maximum according to the wave peak values and the wave valley values.
Further, the step of sequentially finding out a plurality of peak values and a plurality of valley values in the data by using three adjacent value comparison methods specifically includes: sequentially taking first data, second data and third data from the data, wherein the first data is adjacent to the second data, and the second data is adjacent to the third data; determining the second data as a peak if the first data is less than the second data and the third data is less than the second data; determining that the second data is a trough if the first data is greater than the second data and the third data is greater than the second data.
Further, the step of determining a first maximum, a second maximum, …, and an nth maximum according to the plurality of peak values and the plurality of valley values specifically includes: sequentially arranging a plurality of the peak values and a plurality of the valley values according to the order of the plurality of the peak values and the valley values in the data; finding out the wave peak values of which the two sides are wave valley values; and if the wave peak value is larger than the trough values on the two sides of the wave peak value, determining the wave peak value as a secondary maximum value.
Fig. 3 is a schematic block diagram of a first embodiment of a frequency spectrograph with a 2FSK signal peak searching function according to an embodiment of the present invention, as shown in fig. 3, capturing data on a screen of the frequency spectrograph by using Fast Fourier Transform (FFT); then, the maximum value is set, the next maximum value is searched, and the searched next maximum value is stored in the peak value table.
In the embodiment shown in the figure, the 2FSK signal peak searching apparatus comprises: the device comprises a grabbing unit 1, a searching unit 2 and a storing unit 3, wherein the grabbing unit 1 is used for grabbing data on a frequency spectrograph screen in an FFT (fast Fourier transform) mode; the searching unit 2 is configured to sequentially search a first maximum value, a second maximum value, …, and an nth maximum value in the data, where the first maximum value is greater than or equal to the second maximum value, …, and n is a positive integer; the storage unit 3 is configured to store the first maximum, the second maximum, …, and the nth maximum in a peak list.
Referring to fig. 3, compared with the frequency sweep mode, the FFT mode can capture and analyze 2FSK transient signals more quickly, and can display and analyze all signals within a certain bandwidth at the same time, and can find all peak points of multiple groups of 2FSK signals with frequency hopping in the bandwidth, in the specific embodiment of the present invention, the fixed bandwidth is 1.5M; and then all peak points are found out, so that the situation of missing or increasing the peak value can not occur.
Fig. 4 is a schematic block diagram of a second embodiment of a frequency spectrograph having a 2FSK signal peak searching function according to an embodiment of the present invention, as shown in fig. 4, a preset maximum value may be set as required, and the preset maximum value is large enough.
In the embodiment shown in the figure, the 2FSK signal peak searching apparatus comprises: a sorting unit 4 and an initialization unit 5. Wherein the sorting unit 4 is configured to sort the first maximum, the second maximum, …, and the nth maximum; the initialization unit 5 is configured to initialize the peak list.
Referring to fig. 4, after the first maximum, the second maximum, … and the nth maximum are found, the first maximum, the second maximum, … and the nth maximum may be sorted. Particularly, the data can be sorted according to frequency/amplitude, and visual checking is facilitated.
In an embodiment of the present invention, the storage unit 3 further includes: the device comprises a first setting module and a storage module. The first setting module is used for setting a preset maximum value; the storage module is used for sequentially storing a first maximum value, a second maximum value, … and an nth maximum value according to the preset maximum value.
The sorting unit 4 further includes: the second setting module is used for setting a sorting mode; a sorting module for sorting the stored first maximum, second maximum, … and nth maximum according to the sorting mode by using a bubble method
In another embodiment of the present invention, the searching unit 2 further includes: a second lookup module and a determination module. The second searching module is used for sequentially searching a plurality of wave peak values and a plurality of wave valley values in the data by using three adjacent value comparison methods; the determining module is used for determining a first maximum value, a second maximum value, … and an nth maximum value according to the wave peak values and the wave valley values.
Further, the second lookup module further comprises: a selection submodule and a first determination submodule. The selection submodule is used for sequentially selecting first data, second data and third data from the data, wherein the first data are adjacent to the second data, and the second data are adjacent to the third data; the first determining submodule is configured to determine the second data as a peak value when the first data is smaller than the second data and the third data is smaller than the second data, and determine the second data as a valley value when the first data is larger than the second data and the third data is larger than the second data.
Further, the determining module further comprises: a sorting sub-module, a finding sub-module and a second determining sub-module. The sorting submodule is used for sequentially sorting the plurality of wave peak values and the plurality of wave valley values according to the sequence of the plurality of wave peak values and the plurality of wave valley values in the data; the searching submodule is used for searching the wave peak value of which the two sides are wave valley values; and the second determining submodule is used for determining the wave peak value as a secondary maximum value when the wave peak value is larger than the wave trough values on two sides of the wave peak value.
Fig. 5 is a 2FSK signal peak value searched by using a conventional frequency spectrograph according to an embodiment of the present invention, as shown in fig. 5, after data on a screen of the frequency spectrograph is captured by using an FFT method, a first maximum value, a second maximum value, …, and a sixth maximum value are sequentially searched in the data; and finally, carrying out frequency sorting, wherein the sorting result is shown in the figure.
The specific embodiment of the invention provides a method for searching a 2FSK signal peak value by using a frequency spectrograph and the frequency spectrograph, wherein data on a screen of the frequency spectrograph is captured by using Fast Fourier Transform (FFT); then, setting a maximum value, searching a secondary maximum value, storing the searched secondary maximum value into a peak value table, and finally sorting the secondary maximum values in the peak value table to obtain a peak value point; transient signals can be captured and analyzed more quickly, and all transient signals within a certain bandwidth can be displayed and analyzed simultaneously; and finding all peak points of the broadband frequency hopping multiple groups of 2FSK signals in a peak value conventional reading mode, and respectively forming the peak points into multiple groups of 2FSK signals for subsequent display and analysis.
The embodiments of the invention described above may be implemented in various hardware, software code, or combinations of both. For example, an embodiment of the present invention may also be program code for executing the above method in a Digital Signal Processor (DSP). The invention may also relate to a variety of functions performed by a computer processor, digital signal processor, microprocessor, or Field Programmable Gate Array (FPGA). The processor described above may be configured according to the present invention to perform certain tasks by executing machine-readable software code or firmware code that defines certain methods disclosed herein. Software code or firmware code may be developed in different programming languages and in different formats or forms. Software code may also be compiled for different target platforms. However, the different code styles, types, and languages of software code and other types of configuration code that perform tasks in accordance with the present invention do not depart from the spirit and scope of the present invention.
The foregoing is merely an illustrative embodiment of the present invention, and any equivalent changes and modifications made by those skilled in the art without departing from the spirit and principle of the present invention should fall within the protection scope of the present invention.
Claims (8)
1. A method for performing a peak search of a 2FSK signal using a spectrometer, the method comprising:
capturing data on a frequency spectrograph screen by using an FFT (fast Fourier transform) mode;
sequentially searching a first maximum value, a second maximum value, … and an nth maximum value in the data, wherein the first maximum value is more than or equal to the second maximum value, … and more than or equal to the nth maximum value, and n is a positive integer; and
storing the first time maximum, the second time maximum, …, the nth time maximum in a peak list;
sorting the first, second, …, nth maxima;
the steps of sequentially searching the first maximum value, the second maximum value, … and the nth maximum value in the data specifically include:
sequentially finding out a plurality of wave peak values and a plurality of wave valley values in the data by using three adjacent value comparison methods; and
determining a first maximum, a second maximum, … and an nth maximum according to the wave peak values and the wave valley values;
the step of storing the first maximum, the second maximum, …, and the nth maximum in a peak list specifically includes:
setting a preset maximum value; and
sequentially storing a first maximum value, a second maximum value, … and an nth maximum value according to the preset maximum value;
the step of sorting the first maximum value, the second maximum value, …, and the nth maximum value specifically includes:
setting a sorting mode; and
and sorting the stored first maximum value, second maximum value, … and nth maximum value according to the sorting mode by using a bubble method.
2. A method of performing a 2FSK signal peak search using a spectrometer as claimed in claim 1, wherein said first maxima, said second maxima, …, said nth maxima are stored prior to the step of storing a peak list, the method further comprising:
the peak list is initialized.
3. The method of claim 1, wherein the step of sequentially finding a plurality of peaks and a plurality of valleys in the data using three adjacent value comparisons comprises:
sequentially taking first data, second data and third data from the data, wherein the first data is adjacent to the second data, and the second data is adjacent to the third data;
determining the second data as a peak if the first data is less than the second data and the third data is less than the second data; and
determining that the second data is a trough if the first data is greater than the second data and the third data is greater than the second data.
4. The method of claim 1, wherein the steps of determining a first maximum, a second maximum, …, and an nth maximum from a plurality of said peaks and a plurality of said troughs comprise:
sequentially arranging a plurality of the peak values and a plurality of the valley values according to the order of the plurality of the peak values and the valley values in the data;
finding out the wave peak values of which the two sides are wave valley values; and
and if the wave peak value is larger than the trough values on the two sides of the wave peak value, determining the wave peak value as a secondary maximum value.
5. A spectrometer having a 2FSK signal peak search function, the spectrometer comprising:
the grabbing unit is used for grabbing data on a frequency spectrograph screen by using an FFT (fast Fourier transform) mode;
the searching unit is used for sequentially searching a first maximum value, a second maximum value, … and an nth maximum value in the data, wherein the first maximum value is more than or equal to the second maximum value, … and more than or equal to the nth maximum value, and n is a positive integer; and
a storage unit, configured to store the first maximum, the second maximum, …, and the nth maximum in a peak list;
a sorting unit for sorting the first maximum, the second maximum, …, the nth maximum;
wherein the search unit further comprises:
the second searching module is used for sequentially searching a plurality of wave peak values and a plurality of wave valley values in the data by using three adjacent value comparison methods; and
a determining module, configured to determine a first maximum, a second maximum, …, and an nth maximum according to the plurality of peak values and the plurality of valley values;
wherein the memory cell further comprises:
the first setting module is used for setting a preset maximum value; and
the storage module is used for sequentially storing a first maximum value, a second maximum value, … and an nth maximum value according to the preset maximum value;
wherein the sorting unit further comprises:
the second setting module is used for setting a sorting mode; and
and the sorting module is used for sorting the stored first maximum value, second maximum value, … and nth maximum value according to the sorting mode by using a bubble method.
6. A spectrometer having a 2FSK signal peak search function as claimed in claim 5, the spectrometer further comprising:
an initialization unit for initializing the peak list.
7. The spectrometer with 2FSK signal peak search function according to claim 5, wherein said second lookup module further comprises:
the selection submodule is used for sequentially selecting first data, second data and third data from the data, wherein the first data are adjacent to the second data, and the second data are adjacent to the third data;
a first determination sub-module for determining the second data as a peak value when the first data is smaller than the second data and the third data is smaller than the second data, and determining the second data as a valley value when the first data is larger than the second data and the third data is larger than the second data.
8. A spectrometer having a 2FSK signal peak search function as claimed in claim 5, wherein the determining module further comprises:
a sorting submodule configured to sequentially sort the plurality of peak values and the plurality of valley values according to an order of the plurality of peak values and the plurality of valley values in the data;
the searching submodule is used for searching the wave peak values of which the two sides are wave valley values; and
and the second determining submodule is used for determining the wave peak value as a secondary maximum value when the wave peak value is larger than the wave trough values on two sides of the wave peak value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611224240.5A CN108241091B (en) | 2016-12-27 | 2016-12-27 | Method for searching peak value of 2FSK signal by using frequency spectrograph and frequency spectrograph |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611224240.5A CN108241091B (en) | 2016-12-27 | 2016-12-27 | Method for searching peak value of 2FSK signal by using frequency spectrograph and frequency spectrograph |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108241091A CN108241091A (en) | 2018-07-03 |
| CN108241091B true CN108241091B (en) | 2021-09-03 |
Family
ID=62701355
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611224240.5A Active CN108241091B (en) | 2016-12-27 | 2016-12-27 | Method for searching peak value of 2FSK signal by using frequency spectrograph and frequency spectrograph |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108241091B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112486454B (en) * | 2019-09-12 | 2023-07-11 | 北京华航无线电测量研究所 | Sequence multi-peak value searching and sorting device based on FPGA |
Family Cites Families (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0831367A (en) * | 1994-07-12 | 1996-02-02 | Jeol Ltd | Peak searching method for spectrograph |
| CN101136202B (en) * | 2006-08-29 | 2011-05-11 | 华为技术有限公司 | Sound signal processing system, method and audio signal transmitting/receiving device |
| CN100525133C (en) * | 2006-10-31 | 2009-08-05 | 华为技术有限公司 | Sorting device |
| CN101192847B (en) * | 2007-08-13 | 2011-08-10 | 中兴通讯股份有限公司 | A peak search and sorting device and peak sorting method |
| CN101470206B (en) * | 2007-12-29 | 2011-10-05 | 同方威视技术股份有限公司 | Active material detection system and method using multichannel spectrometer |
| CN101719882B (en) * | 2009-10-19 | 2013-01-30 | 中国电子科技集团公司第五十四研究所 | Single carrier frequency-domain equalization-based timing and frequency swing estimation method |
| US20110093225A1 (en) * | 2009-10-20 | 2011-04-21 | Ramesh P E | Method of making frequency domain measurements on a time domain instrument |
| GB201002447D0 (en) * | 2010-02-12 | 2010-03-31 | Micromass Ltd | Mass spectrometer |
| CN101917369B (en) * | 2010-07-30 | 2013-07-24 | 中国人民解放军信息工程大学 | Method for identifying modulation mode of communication signal |
| CN102539111B (en) * | 2011-12-17 | 2014-03-05 | 中国科学院安徽光学精密机械研究所 | Temperature oscillometer based on dsPIC singlechip |
| GB201308591D0 (en) * | 2013-05-14 | 2013-06-19 | Secr Defence | Detection of Electrical Device by Unintentionally Radiated RF Signal |
| CN103454495B (en) * | 2013-09-13 | 2016-01-20 | 电子科技大学 | Self-adaptation high-precision fast spectral analytical approach |
| CN103472338A (en) * | 2013-09-22 | 2013-12-25 | 成都国光电气股份有限公司 | Magnetron test system and method |
| CN103701731B (en) * | 2013-12-31 | 2017-03-22 | 上海高清数字科技产业有限公司 | symbol rate estimation method and device |
| CN103793873B (en) * | 2014-01-26 | 2017-06-13 | 大唐移动通信设备有限公司 | The acquisition methods and device of image pixel intermediate value |
| CN104929616B (en) * | 2014-03-20 | 2018-01-02 | 沈阳中科奥维科技股份有限公司 | A kind of indicator data acquisition adaptive approach towards beam pumping unit |
| CN104486778A (en) * | 2014-12-03 | 2015-04-01 | 北京科技大学 | Signal system recognition method for heterogeneous networks |
| CN104614588B (en) * | 2015-01-27 | 2017-03-29 | 北京奥普维尔科技有限公司 | Peak value searching system and method based on frequency spectrograph |
| CN104914433A (en) * | 2015-06-15 | 2015-09-16 | 南京航空航天大学 | Linked list sorting-based OS-CFAR multi-target extraction realization method |
| CN105115592B (en) * | 2015-09-02 | 2018-02-16 | 东莞市中光通信科技有限公司 | Cranial cavity method for detecting vibration and device |
-
2016
- 2016-12-27 CN CN201611224240.5A patent/CN108241091B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN108241091A (en) | 2018-07-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103984776B (en) | Repeated image identification method and image search duplicate removal method and device | |
| EP3660700A1 (en) | Image retrieval method and apparatus, and electronic device | |
| US10200391B2 (en) | Detection of malware in derived pattern space | |
| CN107274442B (en) | Image identification method and device | |
| JP5944406B2 (en) | Method and apparatus for finding nearest neighbors | |
| CN107978189B (en) | Intelligent exercise pushing method and system and terminal equipment | |
| CN108536739B (en) | Metadata sensitive information field identification method, device, equipment and storage medium | |
| CN111783812B (en) | Forbidden image recognition method, forbidden image recognition device and computer readable storage medium | |
| US8655016B2 (en) | Example-based object retrieval for video surveillance | |
| US20130108176A1 (en) | Image processing apparatus and control method therefor | |
| CN108241091B (en) | Method for searching peak value of 2FSK signal by using frequency spectrograph and frequency spectrograph | |
| US10346716B2 (en) | Fast joint template machining | |
| CN111709951B (en) | Target detection network training method and system, network, device and medium | |
| US10977824B2 (en) | Positioning method and positioning system | |
| CN104598538A (en) | Information searching method and device | |
| CN109993165A (en) | The identification of tablet plate medicine name and tablet plate information acquisition method, device and system | |
| US11210605B1 (en) | Dataset suitability check for machine learning | |
| CN115221374A (en) | Pushing method and device based on chromatographic data analysis and electronic equipment | |
| US20230102127A1 (en) | Systems and methods for identifying samples of interest by comparing aligned time-series measurements | |
| CN112395594B (en) | Method, device and equipment for processing instruction execution sequence | |
| US11386340B2 (en) | Method and apparatus for performing block retrieval on block to be processed of urine sediment image | |
| US11086881B2 (en) | Method and device for analyzing data | |
| CN109376289B (en) | Method and device for determining target application ranking in application search result | |
| CN110032933B (en) | Image data acquisition method and device, terminal and storage medium | |
| CN112861708A (en) | Semantic segmentation method and device for radar image and storage medium |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |